The defective capacitors are at the following locations on the motherboard: C18, C20 and C30.

They have the following markings:
---
A5E
224
ZAA
828

I think they are 0.22uF since that is what is indicated by the schematic (page 305) and I believe the 224 marking on the capacitor indicates this too.
I am also under the impression that all of the capacitors in positions C16 thru C31 are identical, although it's hard to tell since some of the markings are hidden from view or may be faded.

The resistor (from position RP201 on the motherboard) has 8 pins and is marked with the following part number:
8Y680G CM 8828 (the CM looks like a logo)

I think the resistor is a 68 ohm resistor pack since this number appears on the schematic (page 295)

I would be extremely grateful if someone could let me know what would be the ideal replacement parts for these items.

Please note, in case it's not already obvious... I'm completely new to electronics and circuits and so any or all of my assumptions above could be completely wrong. Please feel free to correct me!

Thanks Dennis,
I would like to replace them with equivalent components, but being new to electronics I'm not certain what would constitute an equivalent component. Is there a way to read the markings on these capacitors and resistor so that I can be certain that a replacement part is suitable?
Regards,
Nick

Once you narrow in on some candidate replacements, be sure to pay attention to the physical details. You want the leads to fit the holes, for instance. The resistor network pins need to align to the PCB holes. I wouldn't expect big problems but it sure is annoying if you get new parts only to discover they won't fit.

Here's another issue: Are you sure the board is not multi-level? Replacing parts on a multilevel board is effectively impossible - at least it is for my skill level.

Once you narrow in on some candidate replacements, be sure to pay attention to the physical details. You want the leads to fit the holes, for instance. The resistor network pins need to align to the PCB holes. I wouldn't expect big problems but it sure is annoying if you get new parts only to discover they won't fit.

Here's another issue: Are you sure the board is not multi-level? Replacing parts on a multilevel board is effectively impossible - at least it is for my skill level.